Bill Gates' biggest Microsoft product regret: WinFS — Summary: In his first AMA on Reddit, Microsoft Chairman Bill Gates calls WinFS the Microsoft product he most wished had made it to market. — Microsoft Chairman Bill Gates is doing his first-ever Ask Me Anything (AMA) on Reddit on February 11.

New Compete study: Primary mobile users on Twitter — We like to say that Twitter was born mobile. After all, the 140 character limit of Tweets was based on text messaging or SMS constraints. That means our platform was actually designed to allow anyone, anywhere to read, write and share Tweets.

Willow Garage to Shut Down — IEEE Spectrum has learned that Willow Garage, the Silicon Valley robotics powerhouse that brought the world the PR2, ROS, TurtleBot, and several robotics spinoffs, will likely be dissolving within the next few months. — While we have no official confirmation …

Mike Lynch raises $1bn for technology investment — Former Autonomy boss Mike Lynch has raised $1bn through his Invoke Capital fund to invest in fledgling British technology companies. — Mike Lynch founded Autonomy and sold it to Hewlett Packard for $10bn in 2011.

Snapchat Brings Video To Android In A Private Beta — Snapchat has been on a roll lately, scooping up a $13.5 million funding round from Benchmark last week, toying around with monetization features, and becoming the world's favorite misunderstood mobile app.

Apple To Respond to Greenlight Suit by Wednesday — The walk-up to Apple's Feb. 27 shareholder meeting got more interesting last week when shareholder Greenlight Capital sued the company over its proxy as part of an effort to get Apple to return more cash to shareholders.